mermin_energy       :real:0:
 -0.259169775571175E+001
forces              :real:2:3,2
 -0.212906122160347E-001  0.102691028334534E-001  0.171114972649289E-001
  0.212906122160347E-001 -0.102691028334534E-001 -0.171114972649289E-001
stress              :real:2:3,3
 -0.479541648580067E-004 -0.196988043302175E-003 -0.695192904344796E-004
 -0.196987824865030E-003  0.175046633933231E-004  0.679080750964113E-004
 -0.695196422601542E-004  0.679080628245475E-004  0.229312379404184E-004
